Ok, so yesterday my buddy and I are playing a casual round. But to him and I, casual rounds are played with PDGA/tournament rules. So anyway he putts and misses, it rolls away down a hill probably 150 feet. He tells me that he can putt again from the same spot and take a penalty stroke. I was pessimistic of this call, but I said nothing, we were not playing for money or anything so I just let it go. Can someone tell me for sure if this rule is correct?